In this article
F.INV.RT gives the critical F value for ANOVA at a chosen significance level.
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Syntax
=F.INV.RT(probability, deg_freedom1, deg_freedom2)| Argument | What it means |
|---|---|
probability |
e.g. 0.05 |
df1, df2 |
df |
Examples
Example 1
=ROUND(F.INV.RT(A2,B2,C2),3)Result: 3.098. See the worked example table below for more cases.
F.INV.RT in practice
Where you will use it
- ANOVA critical values
- QC pass/fail limits
- Teaching
Worked example
| alpha | df1 | df2 | Formula | Result |
|---|---|---|---|---|
| 0.05 | 3 | 20 | =ROUND(F.INV.RT(A2,B2,C2),3) | 3.098 |
| 0.01 | 3 | 20 | =ROUND(F.INV.RT(A3,B3,C3),3) | 4.938 |
| 0.05 | 2 | 30 | =ROUND(F.INV.RT(A4,B4,C4),3) | 3.316 |
Results calculated in Excel.
Mistakes people make
| Mistake | What to do instead |
|---|---|
| Using 95 | Use 0.05 |
| Swapping df | Numerator df first |
Related functions
📚 Part of the free Excel course: Beginner → Expert · Try it in the Formula Lab or ask the AI Helper.
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